from datetime import datetime, timedelta
import time

from flask import current_app, jsonify
from flask import g
from flask import redirect
from flask import render_template
from flask import request
from flask import session
from flask import url_for

from info import constants, db
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.image_storage import storage
from info.utils.response_code import RET
from . import admin_blue


@admin_blue.route('/news_type', methods=['GET', 'POST'])
def news_type():
    if request.method == 'GET':

        # 获取所有的分类数据
        categories = Category.query.all()
        # 定义列表保存分类数据
        categories_dicts = []

        for category in categories:
            # 获取字典
            cate_dict = category.to_dict()
            # 拼接内容
            categories_dicts.append(cate_dict)

        # 返回内容
        return render_template('admin/news_type.html', data={"categories": categories_dicts})

    """修改或者添加分类"""

    category_id = request.json.get("id")
    category_name = request.json.get("name")
    if not category_name:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 判断是否有分类id
    if category_id:
        try:
            category = Category.query.get(category_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类信息")

        category.name = category_name
    else:
        # 如果没有分类id，则是添加分类
        category = Category()
        category.name = category_name
        db.session.add(category)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    return jsonify(errno=RET.OK, errmsg="保存数据成功")


@admin_blue.route('/news_edit')
def news_edit():
    """返回新闻列表"""

    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", "")
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = []
        # 如果有关键词
        if keywords:
            # 添加关键词的检索选项
            filters.append(News.title.contains(keywords))

        # 查询
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_edit.html', data=context)


@admin_blue.route('/news_edit_detail', methods=['GET', 'POST'])
def news_edit_detail():
    """新闻编辑详情"""
    if request.method == 'GET':

        # 获取参数
        news_id = request.args.get("news_id")

        if not news_id:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})

        # 查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})

        # 查询分类的数据
        categories = Category.query.all()
        categories_li = []
        for category in categories:
            c_dict = category.to_dict()
            c_dict["is_selected"] = False
            if category.id == news.category_id:
                c_dict["is_selected"] = True
            categories_li.append(c_dict)
        # 移除`最新`分类
        categories_li.pop(0)

        data = {"news": news.to_dict(), "categories": categories_li}
        return render_template('admin/news_edit_detail.html', data=data)

    # 修改编辑新闻的post请求
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key
    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    # 5. 返回结果
    return jsonify(errno=RET.OK, errmsg="编辑成功")


@admin_blue.route('/news_review_detail', methods=['GET', 'POST'])
def news_review_detail():
    """新闻审核"""

    if request.method == 'GET':

        # 获取新闻id
        news_id = request.args.get("news_id")
        if not news_id:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

        # 通过id查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

        # 返回数据
        data = {"news": news.to_dict()}
        return render_template('admin/news_review_detail.html', data=data)

    # 执行审核操作

    # 1.获取参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 2.判断参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ("accept", "reject"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    news = None
    try:
        # 3.查询新闻
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    # 4.根据不同的状态设置不同的值
    if action == "accept":
        news.status = 0
    else:
        # 拒绝通过，需要获取原因
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        news.reason = reason
        news.status = -1

    # 保存数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")


@admin_blue.route('/news_review')
def news_review():
    """返回待审核新闻列表"""

    page = request.args.get("p", 1)
    keywords = request.args.get('keywords', '')

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    # 处理可选参数
    filters = [News.status != 0]

    if keywords:
        filters.append(News.title.contains(keywords))

    try:
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_review_dict())

    context = {"total_page": total_page, "current_page": current_page, "news_list": news_dict_list}

    return render_template('admin/news_review.html', data=context)


@admin_blue.route('/user_list')
def user_list():
    """获取用户列表"""

    # 获取参数
    page = request.args.get("p", 1)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    # 设置变量默认值
    users = []
    current_page = 1
    total_page = 1

    # 查询数据
    try:
        paginate = User.query.filter(User.is_admin == False).order_by(User.last_login.desc()).paginate(page, constants.ADMIN_USER_PAGE_MAX_COUNT, False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    # 将模型列表转成字典列表
    users_list = []
    for user in users:
        users_list.append(user.to_admin_dict())

    context = {"total_page": total_page, "current_page": current_page, "users": users_list}
    return render_template('admin/user_list.html', data=context)


@admin_blue.route('/user_count')
def user_count():
    # 显示上方统计数据

    # 1.用户总数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin==False).count()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库错误")

    # 2.当月新增人数:获取同年同月1号的时间,从这个时间开始查询即可, 比如2018-06-01 00:00:00-->本月的某个时间

    # 2.1 获取当前的年月,日是写死的,从一号开始

    mon_count = 0
    now = datetime.now()
    # 用这个方法获取时间可以将年月日拆分开来
    now = time.localtime()
    try:
        mon_begin = '%d-%02d-01' % (now.tm_year, now.tm_mon)

        # 2.2 将字符串时间转换成日期的格式
        mon_begin_date =datetime.strptime(mon_begin, '%Y-%m-%d')

        mon_count = User.query.filter(User.is_admin == False, User.create_time >= mon_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据库错误")

    # 3. 查询日新增数
    day_count = 0
    try:
        # 2018-6-27
        day_begin = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        day_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 二.下方活跃度
    """
    统计最近一个月每一天的用户活跃度(最后登录)
    # 2018-5-28 --> 2018-5-28 00:00:00 -- 2018-5-29 00:00:00
    User.last_login >= day_begin_date, User.last_login < day_end_date

    1. 如何获取指定日期的下一天时间
    2. 如何快速实现前一个的查询(for)
    """
    # 获取当天的00:00:00时间
    # strftime: 将日期按照一定的格式转换字符串的. 用法和strftime相反
    now_date_str = datetime.now().strftime('%Y-%m-%d')
    now_date = datetime.strptime(now_date_str, '%Y-%m-%d')

    # 定义空数组,保存数据
    active_date = []
    active_count = []

    # 进行for循环,遍历查询每一天的时间对象
    for i in range(0, 31):
        begin_date = now_date - timedelta(days=i)
        end_date = now_date - timedelta(days=(i - 1))
        # 获取计算的当天的日期
        active_date.append(begin_date.strftime('%Y-%m-%d'))
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_date,
                                      User.last_login < end_date).count()
        except Exception as e:
            current_app.logger.error(e)

        # 获取当天的活跃数
        active_count.append(count)

        active_date.reverse()
        active_count.reverse()

    data = {
        'total_count': total_count,
        "mon_count": mon_count,
        "day_count": day_count,
        'active_date': active_date,
        'active_count': active_count
    }
    return render_template('admin/user_count.html', data=data)


# 新闻后台首页
@admin_blue.route('/index')
@user_login_data
def index():
    user = g.user
    return render_template('admin/index.html', user=user.to_dict() if user else None)


@admin_blue.route('/login', methods=['GET', 'POST'])
def login():
    # GET 请求
    if request.method == 'GET':
        # 去 session 中取指定的值
        user_id = session.get("user_id", None)
        is_admin = session.get("is_admin", False)
        # 如果用户id存在，并且是管理员，那么直接跳转管理后台主页
        if user_id and is_admin:
            return redirect(url_for('admin.index'))
        return render_template('admin/login.html')

    # POST 请求
    # 一.获取登陆的参数
    username = request.form.get('username')
    password = request.form.get('password')

    # 二.校验参数
    if not all([username, password]):
        # 此时不要返回jsonfi数据,再次渲染登陆页面
        return render_template('admin/login.html', errmsg="参数错误")

    # 三.逻辑处理
    # 查询当前用户
    try:
        user = User.query.filter(User.nick_name == username, User.is_admin == True).first()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='查询数据库错误')

    if not user or not user.check_password(password):
        return render_template('admin/login.html', errmsg="用户名或者密码错误")

    # 如果登陆正常,保存用户的登录信息
    session['user_id'] = user.id
    session['nick_name'] = user.nick_name
    session['is_admin'] = user.is_admin

    # 跳转到管理员首页
    return redirect(url_for('admin.index'))